A Scalable Safety Critical Control Framework for Nonlinear Systems
A Scalable Safety Critical Control Framework for Nonlinear Systems
复制标题
非线性系统的可扩展安全关键控制框架
DOI:
10.1109/access.2020.3025248
复制
发表时间:
2020
期刊:
影响因子:
3.9
通讯作者:
Ames, Aaron D.
中科院分区:
文献类型:
--
作者:
Gurriet, Thomas;Mote, Mark;Singletary, Andrew;Nilsson, Petter;Feron, Eric;Ames, Aaron D.
There are two main approaches to safety-critical control. The first one relies on computation of control invariant sets and is presented in the first part of this work. The second approach draws from the topic of optimal control and relies on the ability to realize Model-Predictive-Controllers online to guarantee the safety of a system. In the second approach, safety is ensured at a planning stage by solving the control problem subject for some explicitly defined constraints on the state and control input. Both approaches have distinct advantages but also major drawbacks that hinder their practical effectiveness, namely scalability for the first one and computational complexity for the second. We therefore present an approach that draws from the advantages of both approaches to deliver efficient and scalable methods of ensuring safety for nonlinear dynamical systems. In particular, we show that identifying a backup control law that stabilizes the system is in fact sufficient to exploit some of the set-invariance conditions presented in the first part of this work. Indeed, one only needs to be able to numerically integrate the closed-loop dynamics of the system over a finite horizon under this backup law to compute all the information necessary for evaluating the regulation map and enforcing safety. The effect of relaxing the stabilization requirements of the backup law is also studied, and weaker but more practical safety guarantees are brought forward. We then explore the relationship between the optimality of the backup law and how conservative the resulting safety filter is. Finally, methods of selecting a safe input with varying levels of trade-off between conservatism and computational complexity are proposed and illustrated on multiple robotic systems, namely: a two-wheeled inverted pendulum (Segway), an industrial manipulator, a quadrotor, and a lower body exoskeleton.
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DOI:
--
发表时间:
2018
期刊:
IEEE Conference on Decision and Control
影响因子:
--
作者:
Thomas Gurriet;Mark L. Mote;A. Ames;E. Feron
通讯作者:
E. Feron
DOI:
--
发表时间:
2015
期刊:
SNR@CAV
影响因子:
--
作者:
Ian M. Mitchell
通讯作者:
Ian M. Mitchell
DOI:
--
发表时间:
2019
期刊:
IEEE/SICE International Symposium on System Integration
影响因子:
--
作者:
Justin Carpentier;Guilhem Saurel;Gabriele Buondonno;Joseph Mirabel;F. Lamiraux;O. Stasse;N. Mansard
通讯作者:
N. Mansard
DOI:
10.1016/0734-189x(89)90038-8
发表时间:
1989-06
期刊:
Comput. Vis. Graph. Image Process.
影响因子:
--
作者:
H. Samet
通讯作者:
H. Samet
影响因子:
3.5
作者:
Hornung, Armin;Wurm, Kai M.;Burgard, Wolfram
通讯作者:
Burgard, Wolfram